The invention relates to a preparation method for beef paste with mushroom. The preparation method comprises the following steps of 1) preparing 100 g of bean halves, 150 g of coarse chili powder, 25 g of fresh ginger powder, 20 g of fructus lycii, 30-35 g of salt, 25 g of monosodium glutamate, 400 g of vegetable oil, 25 g of white sugar, 50 g of pepper powder, a small amount of thirteen spices, 50 g of water-swollen mushroom, 50 g of white sesame seed, 75 g of salt-fried peanuts and 100 g of boiled streaky beef, wherein the bean halves, the water-swollen mushroom and the salt-fried peanuts are cut up and the boiled streaky beef is cut into minced meat; 2) putting 100 g of the bean halves, 150 g of the coarse chili powder, 25 g of the fresh ginger powder, 20 g of the fructus lycii, 400 g of the vegetable oil, 25 g of the white sugar, 50 g of the pepper powder, a small amount of the thirteen spices, 50 g of the water-swollen mushroom, 50 g of the white sesame seed, 75 g of the salt-fried peanuts and 100 g of the boiled streaky beef into a pot, adding 200-230 g of water, stewing for 3-5 minutes with a small fire, 5-8 minutes with a middle fire and 2-5 minutes with a big fire; and 3) putting 30-35 g of the salt, stewing for 3 minutes with the small fire, adding 25 g of monosodium glutamate, stopping the fire, and waiting for 5 minutes with a cover,, so that the beef paste with the mushroom is prepared.