China and Albania continued to take thinly veiled swipes at each other today while publicly denying that they have any quarrel.

As in most cases when Communist countries bicker, the criticisms were done by quoting third parties, in general terms and without mentioning the name of the target.

Peking published prominently a Greek Marxist's attack on "revisionism, dogmatism, divisionism and opportunism" of those criticizing one of the doctrines of the Mao Tse-tung.

Tiran, meanwhile, repeated all the arguments against the doctrine but attributed them to a Spanish splinter group that, it said, had properly pilloried "the new and old opportunists," upholding the disputed doctrine.

The doctrine both countries were using as their battleground was the "three worlds theory," which holds that there are three categories of countries: superpowers, developed countries and developing countries.But the presentations strongly suggested that the doctrine was of less immediate interest than the opportunity it provided for sniping at the opposition.

The Chinese attack, carried in People's Daily and another Peking newspaper, spoke of "opportunism that may be leftist in words" but "isolates the proletariat . . . and serves the policies and cunning plots of Soviet social imperialism."

Western observers in Peking saw in the Chinese attack a warning that Albania may find itself isolated in the Communist movement. The small Balkan state has been estranged from Moscow for years, and China is virtually its only ally.

Observers in Vienna, where the Albanian broadcast repeating the criticisms was monitored, saw in the Tirana government's reference to its "fight against imperialist and revisionist encirclement and against all sorts of pressures" an acknowledgement of the Chinese attack coupled with a determination to stay firm in its own ideological "correctness."

Still, one matter on which the Chinese Foreign Ministry and the Albanian embassy in Peking agreed on today was that there is no dispute at all between them. Referring to reports yesterday that Albania had said that Chinese experts should leave once their contracts are completed, China called such reports "unfounded" the embassy called them "calumnies."

Meanwhile, Leonard Woodcock, former president of the United Auto Workers, arrived here today to take up his duties as head of the U.S. liaison office in China.