The utility model relates to a manual injurious insect sucking machine, belonging to the technical field of plant protection. The machine comprises a suction fan which is driven by an engine. The suction fan is installed on an installation rack. An air inlet pipe of the suction fan is connected with an insect suction head through a connecting pipe. The air outlet of the suction fan is connected with an insect collection net. After the engine is started up, the suction fan is driven to rotate, negative pressure is generated in the air inlet pipe and air enters the suction fan through the connecting pipe from gaps on the two sides or in the middle of the insect suction head. When the manual injurious insect sucking machine works, the entire machine is carried on the back by virtue of straps, a handle hard pipe is handheld to enable the lower part of the insect suction head to get close to the upper surface of plants and swing leftwards and rightwards or forwards and backwards, and injurious insects which hide in the plants are enabled to be disturbed, fly, jump and escape, are sucked into the suction fan from a skirt chamber of the insect suction head and are discharged to the insect collection net at the air outlet. The manual injurious insect sucking machine has the remarkable advantages of environmental friendliness, good mobility, obvious insect elimination effect and the like.