The invention discloses a permanent magnet direct current brushless motor used for a handheld dust collector. The permanent magnet direct current brushless motor comprises a motor body (1), a static impeller (2), a movable impeller (3), a fan cover (4) and a circuit board (5). The static impeller (2) is fixed to an extending front end of a driving shaft (11) of the motor body (1) in a matched mode, and the driving shaft (11) of the motor body (1) penetrates through the static impeller (2). The movable impeller (3) is coaxially fixed at the extending end of the driving shaft (11). A fan cover opening (41) and an air suction opening (42) which are coaxially connected are arranged on two ends of the fan cover (4) respectively, and the fan cover (4) covers the movable impeller (3) through thefan cover opening (41) and is matched and fixed with the static impeller (2). And the circuit board (5) is matched and fixed at a rear end of the motor body (1). The structure is compact, efficiency is high, a rotating speed is fast and a size is small so that the overall size of the handheld dust collector is effectively reduced, and use power and efficiency of the handheld dust collector are effectively improved.