‘Yinguan No.2’ is a mid-matured muskmelon F₁ hybrid developed by crossing inbred line ‘M5’as female parent and inbred line‘F4’as male parent．The plant has strong growth vigor．It bears fruits in order and matures in full accordance．Its growth period in plastic greenhouse is about 100 days in early spring．It can yield about 54.00 t · hm^-2．Its single fruit weight is 2.6 kg．In open field cultivation，its growth period is about 95 days．It can yield about 57.75 t · hm^-2．The single fruit weight is 3.5 kg．Fruit development period is 45-50 days．Its fruit is of short oval shape with green flesh．The fruit peel is white with fine overlapping curve．The fruit flesh is 6.0 cm in thickness．The central soluble solid content is 16.3%．In fields，its resistances to powdery mildew，downy mildew and gummy stem blight are equal to that of the contrast‘ Yindi’．The pedicel does not fall off when ripening．Its peel is firm and tenacious and tolerant to storage and transportation．It is suitable for planting in open and protected fields in Gansu，Shaanxi Provinces，Inner Mongolia and Xinjiang Autonomous Regions．