The invention provides a reel type sprinkling irrigation machine PE pipe moving speed detection device, and belongs to the technical field of reel type sprinkling irrigation machines. The reel type sprinkling irrigation machine PE pipe moving speed detection device comprises a pipe arranging rack, a roller, a roller shaft, an encoder, a bearing, a spring hold-down device and a signal detection system. The roller and the roller shaft are coaxially and fixedly connected. The pipe arranging rack support the roller and the roller shaft through the bearing. The encoder and the roller shaft are fixedly connected. The signal detection system and the encoder are electrically connected. The spring hold-down device applies a pressure to a reel type sprinkling irrigation machine PE pipe to enable the PE pipe to tightly contact the roller. The roller is driven to rotate when the PE pipe moves. The PE pipe and the roller do not relatively slide. The roller rotates to drive the rotation of the roller shaft. The rotation of the roller shaft enables the encoder to generate pulse signals. The signal detection system determines the moving speed of the PE pipe according to the pulse signals. According to the invention, the reliability, the measuring accuracy and the precision are high, and real-time measurement is realized.