A　new　robust　beamforming　method　is　proposed　for　signal　steering　vector　errors　and　moving　jammers.　This　method　is　based　on　the　minimum　variance　distortionless　response　(MVDR)　method.　Under　the　premise　of　knowing　signals＇　DOA　information,　the　signal-free　covariance　matrix　is　constructed　in　order　to　solve　the　signal　steering　vector　mismatch　problem.　Each　jammer　from　a　single　direction　is　changed　into　a　bunch　of　jammers　which　can　broden　the　null　width.　The　null　width　and　depth　can　also　be　changed　if　necessary.　Numerical　simulations　show　that　this　method　has　excellent　performance　under　the　condition　of　signal　steering　vector　mismatches　and　moving　jammers.　This　method　takes　only　one　degree　of　freedom　unlike　the　method　of　least　square　with　linear　constraints　(LC-LS).　The　computation　complexity　of　array　signal　processing　is　also　reduced　significantly　which　is　conducive　to　real-time　computation.　©　2011　IEEE.