The invention discloses a static friction angle tester. The tester comprises a bottom plate and a carrying plate, a stepping motor is fixedly connected to the outer wall of the top of the bottom plate, the output end of the stepping motor is fixedly connected with a coupler, the coupler is connected with a worm shaft, the end, away from the coupler, of the worm shaft is fixedly connected with a worm shaft spacer bush, a worm is fixedly connected to the outer wall of the worm shaft, the upper part of the worm is engaged with a worm wheel through a gear, and a driven long shaft is fixedly connected into the worm wheel. When a sample bottle begins to slide down to a position between two opposite-type gratings, a signal is instantly transmitted to stop the motor from rotating, the accuracy ofa measured value is guaranteed, the angle value displayed on a dial is four times of the rotating angle of a measuring platform under effect of two cylindrical gears in different sizes, the resolutionvalue of the displayed angle is smaller, and recording is more accurate.