My website loading speed is too slow, experts please suggest some good way

Your biggest problem appears to be the file size of some of your images, particularly those in the slider. They’re simply far larger than they need to be. Compressing the images in your favorite image editor to a quality that is 80% or less would help, as would a plugin like https://wordpress.org/plugins/ewww-image-optimizer/

You can find more details and recommendations at https://www.webpagetest.org/result/170416_EN_RRM/ and https://gtmetrix.com/reports/emaksolution.com/znvZWNL9