Pete Rose doubled home two runs in the fifth inning to break a 1-1 tie and give Mike Krukow all the runs he needed as the Philadelphia Phillies extended their winning streak to seven games with a 6-1 victory over the visiting San Francisco Giants yesterday.

Krukow (3-2), who gave up a second-inning home run to Jack Clark, pitched a three-hitter. Atlee Hammaker (2-1) was the loser. Clark's homer is the only one given up this season by Krukow in 50 1/3 innings.

Krukow, a right-hander acquired from the Chicago Cubs during the winter, says pitching for the Phillies has helped his confidence. "You can just go out and relax and be yourself," he said. "You don't have to be Cy Young. In Chicago sometimes, you felt like you had to strike out all 27 batters."

With the score tied, 1-1, Manny Trillo walked to open the fifth and moved up on a sacrifice bunt by Ivan DeJesus. Rookie third baseman Tom O'Malley robbed Krukow of a hit, but Bob Dernier, who had homered in the first inning, singled to put runners at first and third. Rose then lined his double off the fence in left to score both runners.